MAGNETIC MEASUREMENTS OF HIGH QUALITY SINGLE CRYSTAL YBa2Cu3O7-δ

We have investigated the magnetic measurements on high quality single crystals of YBa 2 Cu 3 O 7-δ. Several magnetization hysteresis loops have been obtained for different temperature values, and as a function of the angle θ between the direction of the applied magnetic field and the c-axis of the sample. Measurements were performed at magnetic field up to 6 Tesla and various temperatures between 10 and 90 K. Magnetization hysteresis loops scale and shape are strongly dependent on the temperature values. Our results show that the magnetic properties are profoundly affected by flux lines pinning. The irreversible magnetization decreases as the applied magnetic field deviates from the c-axis (θ increases).

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Magnetic Properties of the Gd1-xTbxNi3 Intermetallic Compounds

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.170.109 ◽

2011 ◽

Vol 170 ◽

pp. 109-113 ◽

Cited By ~ 10

Author(s):

Anna Bajorek ◽

Grażyna Chełkowska ◽

Artur Chrobak ◽

Marzena Kwiecień-Grudziecka

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Curie Temperature ◽

Saturation Magnetization ◽

Intermetallic Compounds ◽

Applied Magnetic Field ◽

Magnetic Measurements ◽

Zero Field ◽

Zero Field Cooling ◽

Field Cooling

The paper presents selected magnetic properties of the Gd1-xTbxNi3 intermetallic compounds. Based on the wide-ranging SQUID magnetometer (Quantum Design MPMS, temperature from 1.9K to 300K and magnetic field up to 7T) series of different magnetic measurements were carried out. In studied system the saturation magnetization and the Curie temperature strongly depends of Tb concentration. Moreover, the so-called field cooling - zero field cooling (FC-ZFC) curves reveal a dependence of M(T) on the applied magnetic field. The thermomagnetic curves indicate interesting behaviour which is typical for terbium compounds and can be ascribed to the interaction between different aligned magnetic subblattices.

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Electrical-Transport, Magnetoresistance and Magnetic Properties of La1-xCaxMnO3 (x = 0.12 and 0.3) Single Crystals

Journal of Metastable and Nanocrystalline Materials ◽

10.4028/www.scientific.net/jmnm.28.65 ◽

2016 ◽

Vol 28 ◽

pp. 65-70

Author(s):

Tejas M. Tank ◽

Ashish Bodhaye ◽

Yakov M. Mukovskii ◽

Sankar P. Sanyal

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Transition Temperature ◽

Single Crystal ◽

Single Crystals ◽

Applied Magnetic Field ◽

Electrical Transport ◽

Floating Zone ◽

Metal To Insulator Transition ◽

The Magnetic Field

We report the electrical-transport and magnetic properties of the hole doped La0.7Ca0.3MnO3 (LCMO-1) and La0.88Ca0.12MnO3 (LCMO-2) single crystals, prepared using floating zone technique. The metal to insulator transition (TMI) occurs at 211 K along c-axis and TMI = 185 K along ab-plane for LCMO-1 single crystal. No electronic transition was observed over the whole temperature range under the magnetic field up to 8 T for LCMO-2 single crystal. It is observed that the TMI is higher along c-axis as compared to that in the ab-plane, consequently signifying more favorable hoping of electrons is along c-axis in LCMO-1. The ac-susceptibility measurement shows that ferromagnetic to paramagnetic transition temperature (TC) at 206 K for LCMO-1 and TC = 118 K for LCMO-2 single crystals which is seemingly related to notable change of resistance at 120 K in LCMO-2 single crystal. The maximum MR of 98% for LCMO-1 and 59% for LCMO-2 single crystals up to 8 T applied magnetic field along c-axis and ab-plane, respectively are observed.

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Tunable magnetization steps in mixed valent ferromagnet Eu2CoMnO6

Scientific Reports ◽

10.1038/s41598-021-88950-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Nara Lee ◽

Jong Hyuk Kim ◽

Dong Gun Oh ◽

Hyun Jun Shin ◽

Hwan Young Choi ◽

...

Keyword(s):

Material Processing ◽

Magnetic Properties ◽

Single Crystals ◽

Magnetic State ◽

Hysteresis Loops ◽

Double Perovskite ◽

Processing Parameters ◽

Perovskite Oxides ◽

Efficient Approach ◽

Isothermal Magnetization

AbstractMagnetic properties can be manipulated to enhance certain functionalities by tuning different material processing parameters. Here, we present the controllable magnetization steps of hysteresis loops in double-perovskite single crystals of Eu2CoMnO6. Ferromagnetic order emerges below TC ≈ 122 K along the crystallographic c axis. The difficulty in altering Co2+ and Mn4+ ions naturally induces additional antiferromagnetic clusters in this system. Annealing the crystals in different gas environments modifies the mixed magnetic state, and results in the retardation (after O2-annealing) and bifurcation (after Ar-annealing) of the magnetization steps of isothermal magnetization. This remarkable variation offers an efficient approach for improving the magnetic properties of double-perovskite oxides.

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Exact magnetic properties for classical delta-chains with ferromagnetic and antiferromagnetic interactions in applied magnetic field

Physical Review B ◽

10.1103/physrevb.101.054427 ◽

2020 ◽

Vol 101 (5) ◽

Cited By ~ 1

Author(s):

D. V. Dmitriev ◽

V. Ya. Krivnov ◽

J. Schnack ◽

J. Richter

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Applied Magnetic Field

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Consideration of Magnetic Measurements for Characterisation of Ferrite–Martensite Commercial Dual-Phase (DP) Steel and Basis for Optimisation of the Operating Magnetic Field for Open Loop Deployable Sensors

Metals ◽

10.3390/met11030490 ◽

2021 ◽

Vol 11 (3) ◽

pp. 490

Author(s):

Mohsen Aghadavoudi Jolfaei ◽

Lei Zhou ◽

Claire Davis

Keyword(s):

Magnetic Field ◽

Applied Magnetic Field ◽

Magnetic Measurements ◽

Initial Permeability ◽

Open Loop ◽

Dual Phase ◽

Dp Steel ◽

Ferrite Fraction ◽

Lift Off ◽

Steel Properties

The magnetic properties of commercial dual-phase (DP) steels (DP600, DP800 and DP1000 grades) were evaluated using initial permeability, incremental permeability and coercivity and correlated with the key microstructural differences between the grades. The ferrite grain sizes and ferrite fractions have been compared with the magnetic parameters obtained from minor and major magnetisation loops within each DP grade. It has been revealed that the incremental permeability increases with the applied magnetic field amplitude to reach a peak and then drops at a higher magnetic field, with the values being different for the three DP grades at a lower field and converging to a similar permeability value at the high field. The effects of ferrite grain size and phase fraction on the incremental permeability are considered, and it has been shown that the influence of ferrite grain boundaries on magnetic permeability is more dominant than the effect of ferrite fraction in commercial DP steel samples. An analysis of the correlation between coercivity and initial permeability with tensile strength shows that the initial permeability provides a slightly better prediction of strength for the steels examined, which is believed to be due to the fact that a combination of reversible and irreversible domain components affect the coercivity value, while the initial permeability is predominantly affected by reversible domain movements. Based on the trend between incremental permeability and applied magnetic field and the commercial EM sensor (EMspec) operating parameters, the effect of lift-off and hence magnetic field strength on the sensitivity to DP steel properties can be assessed.

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Structural, Electrical and Magnetic Properties of Modified Bi1/2Na1/2TiO3 - Modified CFO Based Magnetostrictive (Co0.6Zn0.4Fe1.7Mn0.3O4) Particulate Nanocomposite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.886.13 ◽

2017 ◽

Vol 886 ◽

pp. 13-16

Author(s):

Mintu Tyagi ◽

Vinod Kumar ◽

Gurpreet Kaur ◽

Puneet Sharma

Keyword(s):

Magnetic Properties ◽

Magnetic Measurements ◽

Ferroelectric Properties ◽

Sol Gel ◽

Hysteresis Loops ◽

Lead Free ◽

Great Opportunity ◽

Electrical And Magnetic Properties ◽

Device Applications ◽

Two Phases

Lead free Multiferroic composites that comprise Co0.6Zn0.4Fe1.7Mn0.3O4 (CZFMO) and 72.5(Bi1/2Na1/2TiO3)-22.5(Bi1/2K1/2TiO3)-5(BiMg1/2Ti1/2O3) (BNT-BNT-BMgT) were synthesized using sol-gel method and it’s structural, ferroelectric and magnetic properties were studied. The X-ray diffraction displayed the single phase formation of parent phases and the presence of two phases in the composites. The samples showed a well saturated polarization-electric field hysteresis loops. The remnant polarization and saturation polarization values are decreased with increasing ferrite content. Room temperature (RT) magnetic measurements show that composites are soft magnetic. The composite with x = 0.2, showed the enhanced magnetic and ferroelectric properties. Moreover, these ME composites provide a great opportunity as potential lead free systems for multifuntional device applications.

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Structural and Magnetic Properties of Ni0.8Fe0.2/Ti Nanoscale Multilayers

Nanomaterials ◽

10.3390/nano8100780 ◽

2018 ◽

Vol 8 (10) ◽

pp. 780 ◽

Cited By ~ 2

Author(s):

Ricardo López Antón ◽

Juan A. González ◽

Juan P. Andrés ◽

Andrei V. Svalov ◽

Galina V. Kurlyandskaya

Keyword(s):

Magnetic Properties ◽

Temperature Dependence ◽

Layered Structure ◽

Magnetic Measurements ◽

Hysteresis Loops ◽

Multilayered Structures ◽

X Ray ◽

Structural And Magnetic Properties

The influence of the thickness of the Ni0.8Fe0.2 (Permalloy, Py) layers on the structural and magnetic properties of magnetron sputtered Py/Ti multilayers was studied. The thickness of the Py layers was varied in the interval of 8 to 30 Å. X-ray reflectivity scans evidence the existence of a well-defined layered structure in all the samples considered, but also the presence of a complex intermixed interface. The shape of both the temperature dependence of magnetization and the hysteresis loops of the multilayered structures depends strongly on Py thickness. Magnetic and reflectivity measurements were comparatively analyzed in order to better understand the structure of the samples, and specifically, their interfaces. In particular, the presence of small superparamagnetic Py at the interfaces of the samples, especially evident in the samples with the thinnest Py layers, seems confirmed by the magnetic measurements, agreeing well with the reflectivity results.

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